A Black Lives Matter protest turned violent on Thursday night in El Cajon, near San Diego, as demonstrators attacked cars and at least one motorcycle while protesting the death of 38-year-old Ugandan refugee Alfred Olango earlier this week.

The Associated Press is reporting that officials twice tried and failed to deport Alfred Olango, the former refugee with a history of mental problems who was shot and killed by police in El Cajon, California on Tuesday.

The shooting was prompted when the man reportedly pulled an object from his pocket and aimed it an officer. El Cajon police chief Jeff Davis said the man “placed both hands together on [the object] and extended it rapidly toward the officer, taking what appeared to be a shooting stance.”